I pretty much learned this by listening to County 2734, "Down to the Cider Mill" with Tommy Jarrell, Oscar Jenkins and Fred Cockerham. The fiddlers companion files this under "Paddy won't you drink some cider", and it has three parts there. Maybe Jarrell & co also do three parts, but I can't tell the difference between the 2nd and 3rd and it just sounds like a double-repeated B. to me. There are some other "Cider Mill" tunes/variations that I'd like to learn.